Context Managers

class pyomo.core.expr.current.nonlinear_expression

Context manager for mutable nonlinear sums.

This context manager is used to compute a general nonlinear sum while treating the summation as a mutable object.

Note

The preferred context manager is mutable_expression, as the return type will be the most specific of SumExpression, LinearExpression, or NPV_SumExpression. This context manager will always return a SumExpression.

class pyomo.core.expr.current.linear_expression

Context manager for mutable linear sums.

This context manager is used to compute a linear sum while treating the summation as a mutable object.

Note

The preferred context manager is mutable_expression. linear_expression is an alias to mutable_expression provided for backwards compatibility.

class pyomo.core.expr.current.clone_counter

DEPRECATED.

Context manager for counting cloning events.

This context manager counts the number of times that the clone_expression function is executed.

Deprecated since version 6.4.3: The clone counter has been removed and will always return 0.

Beginning with Pyomo5 expressions, expression cloning (detangling) no longer occurs automatically within expression generation. As a result, the ‘clone counter’ has lost its utility and is no longer supported. This context manager will always report 0.

property count

A property that returns the clone count value.